Brendan Eich

The CEO of dating service OkCupid.com, which urged customers not to use Mozilla’s Firefox browser because of the Mozilla CEO’s past support of Proposition 8, once donated to an anti-gay congressman, according to a report.

The resignation of Mozilla’s CEO amid outrage that he supported an anti-gay marriage campaign is prompting concerns about how Silicon Valley’s strongly liberal culture might quash the very openness that is at the region’s foundation.

An online dating site is asking its customers not to use the Firefox browser made by Mountain View-based Mozilla as a protest against Mozilla’s new chief executive over his prior support of California’s gay marriage ban.